Chuck for web-spindles.



G. F. SULLIVAN. l cHucK Fo wE'sPlNnLEs. APPLICATION FILED IUNE I2, l9l3. 1,136,627. Patented Apr. 20, 1915.

YInma' yeofye-Z GEORGE F. SULLVAN, 0F CAMBRIDGE, MASSAGHUSETTS.

CHUCK FOR WEB-SPINDLES.

specification of Letters Patent.

Patented Apr. 20, 1915;

Application med June 12, 191s. ser1a1 No. 773,244.'

To all whom it may concem:

Be it known that I, GEORGE F. SULIJVAN, a citizen of the United States, and a resident of Cambridge, in the county of Mid- .dlesex and State of Massachusetts, have invented certain new and useful Improvements in Chucks for Web-spindles, of'which the following is a specication. v

This invention relates to means for secur ing a tubular core carrying a rolled up web of paper for use in a. printing press, to the shaft or spindle which supports the web on the press. y

The invention is embodied in a chuck adapted to be firmly engaged with the tubular core, the chuck being preferably double acting so that it is engageable simultaneously with the core and with the spindle.

Of, the accompanying drawings :Figure l represents a side elevation of a chuck embodying my invention, and of a portion of the spindle, portions of the core and of the web thereon'being shown in section.` Fig. 2 represents a section on line 2-2 of Fig. 1. Fig. 3 represents a' section online 3-3 of Fig. 2. Fig. 4 represents a section on line 4-4 of Fig. 3. Fig. 5 represents an edge view of the cam ring hereinafter referred to. Figs. 6 and 7 are detail views similar to a portion of Fig. 3, illustrating a modification hereinafter described. l Fig. 8 is a perspective view of one of the struts shown in Figs. 6 and 7.

The same reference characters indicate the same parts of all the figures.

In the drawings 12 represents a rotary shaft or spindle adapted to rotate in bear- 'ings on the frame of a printing' press, and 13 represents a tubular core of metal or fibrous material on which aweb of paper 14 is wound.

15 represents the body of my improved chuck, the same being a sleeve adapted to receive the spindle 12, and'to enter the core 13, a portion of the said body being preferably enlarged to form ahead which may be composed of an outer portion or ange 15a integral with the portion which enters the core, and an inner portion 16 attached by crews 17 to the flange 15a. The sleeve is provided with longitudinal slots 18 which preferably extend through the entire thickness cf the wall of the sleeve excepting at the end portions of the slots where their continuity is interrupted by bridges integral with the portionsl and 16 and provided with inclined faces 19. Outer keys 2-0 are movable longitudinally in the slots 18., and are provided on their inner edges with inclined faces 2l bearing on the faces 19, said faces 19 and 21 constituting complemental means whereby when the keys are moved longitudinally in the direction of the arrow Fig. 3, they are also moved radially outward and caused to engage the inner surface of the core 13, the outer edges of the keys being provided with gripping angles preferably formed by imparting a transverse curvature to said outer faces as shown by Fig. 4. The keys 20 are movable simultaneously and positively in the direction of the arrow w by a cam ring 23 havingrcam faces 24 against which the inner ends of the keys are pressed by springs 25, FigV 3.

The ring 23 is adapted to be rotated in a chamber or bearing formed in the head port1on l5, and is provided with a gear 26, Fig. 5, meshing with a pinion 27 on a'radial stud 28 which is journaled in a bearing 29 in the enlarged portion of the sleeve and is provided with a squared head 30 adapted to be engaged and rotated by a wrench.

.The rotation of the cam ring in one direction causes the cam faces to positively move the keys 20 in the direction of the arrow w, thus engaging the keys with the core, and its rotation in the opposite direction permits the springs 25 to move the keys in the opposite direction, thus releasing the keys from gripping engagement with the core.

While the sleeve 15 may be engaged with lthe spindle 12 by any suitable means, I

prefer to causel such engagement by the means next described.

In the open portions of the slots 18 between the bridges on which the inclines A19 are formed, are-inner keys 32 which are connected with said bridges by flexible spring strips 33 which permit the inner keys to move radially inward and prevent them from moving longitudinally. The inner keys 32 haveinclined faces 35 on their outer edges on which bear similarly inclined faces 36 on the inner edges of the outer keys 19. The inner keys have gripping angles on their inner edges adapted to engage the spindle 12. It will now be seen that when the outer keys are moved in the direction of the arrow the inner keys are moved radially inward by the movement of the inclined faces 36 'on the inclined faces 35, the inner keys being 'therefore engaged with the spindle by the operation of engaging the outer keys with the core.

Instead of employing the coacting inclined faces 19, 21, 35, 36, I may provide swinging struts 37, as shown in Figs. 6, 7,

` are moved longitudinally in the mannerand 8, the keys 20c and 32"4 being provided with recesses to form bearings for the' ends of said struts, so that when the outer keys hereinbefore described, they engage the their entire length and firmly and rigidly secure the core and its roll to the shaft or spindle.

I claim 1. A double acting chuck comprising a sleeve having longitudinal slots, inner and outer vkeys movable in said slots, yielding means preventing longitudinal movement of the inner keys, the imierkeys being movable radially inward and immovable longitudinally, while the outer keys are movable radially outward and longitudinally, and means for positively moving the outer keys longitudinally in one direction, the sleeve and keys being provided with complemental means whereby said longitudinal movement of the outer keys is caused to simultaneously move the inner keys radially inward andthe outer keys radially outward. v

2. A double acting chuck comprising a sleeve having longitudinal slots, inner and outer keys movable in said slots, yielding means preventing longitudinal movement of the inner keys, the inner keys being movable radially inward and immovable longitudinally, while the outer keys are movable radially outward and longitudinally, and a cam ring movable in the' sleeve and having cam faces adapted to move the outer keys longitudinally in one direction, the sleeve and keys being provided with complemental means whereby said longitudinal movement ofthe outer keys is caused to simultaneously move the inner keys radially inward and the outer keys radially outward. l 3. A double acting chuck comprising a sleeve having longitudinal slots, inner and outer keys movable in said slots, yieldingmeans preventing longitudinal movement of the inner keys, the inner keys being movable radially inward and immovable longitudinally, while the outer keys are movable radially outward and longitudinally, and a cam ring movable' in the sleeve and having cam faces adapted to move the outer keys longitudinally in one direction,` the sleeve and keys being provided with complemental means whereby said longitudinal movement of the outer keys vis caused to simultaneously move the inner keys radially inward and the outer keys radially outward, means being provided for yieldinglyT holding the outer keys against the cam ring.

4. A double 'acting chuck comprising a sleeve having longitudinal slots and spaced apart bridges extending across the end portions of the slots, inner keys located in said slots between the vbridges and lhaving bearings, yielding connections between the inner keys and the bridges which-permit radial inward movement of said keys and prevent longitudinal movement thereof, youter keys longitudinally moyable in said slots and having bearings, swinging struts fitting betions between the inner keys and the bridges which permit radial inward movement ofsaid keys and prevent longitudinal movement thereof, outer keys longitudinally movable in said slots and having bearings in their inner sides, swinging struts fitting between the bearings of the inner and outer keys, a cam ring movable in the sleeve and having cam faces bearing on the outer keys and adapted to move the same endwise in one direction, springs yieldingly holding the outer keys against the cam ring, and means for partially rotating said yring.

6. A double acting chuck comprising a sleeve having longitudinal slots and spaced apart bridges extending across the end'portions of the slots, inner keys located in said slots between the bridges and having bearings, yielding connections between the inner ward movement of said keys and prevent l longitudinal movement thereof, outer keys longitudinally movable in said slots and having bearings, swinging struts fitting between the bearings of the inner and outer keys, a cam ring movable in the sleeve and having cam faces bearing on the outer keys and adapted to move the same endwise in one direction, springs yieldingly holding the outer keys against thecam ring, said ring being provided with a segmental rack, and a radial stud journaled in the sleeve and provided with a pinion meshin with said rack.'

In testimony whereof I aveaiiixed my presence of two witnesses.

signature, 1n

GEORGE F. SULLIVAN.

Witnesses:

A. W. HARRISON, P. W. Pnzzn'rrr. 

